US4172231A - Transfer of a flexible web member from supply reel to a take-up reel - Google Patents

Transfer of a flexible web member from supply reel to a take-up reel Download PDF

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US4172231A
US4172231A US05/810,276 US81027677A US4172231A US 4172231 A US4172231 A US 4172231A US 81027677 A US81027677 A US 81027677A US 4172231 A US4172231 A US 4172231A
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Prior art keywords
reel
web
tape
reels
positions
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Expired - Lifetime
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US05/810,276
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English (en)
Inventor
Stephane M. d'Alayer de Costemore d'Arc
John L. Hiley
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Staar SA
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Staar SA
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Publication date
Priority claimed from FR7620499A external-priority patent/FR2357978A1/fr
Priority claimed from FR7716597A external-priority patent/FR2392914A1/fr
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/46—Controlling, regulating, or indicating speed
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/43—Control or regulation of mechanical tension of record carrier, e.g. tape tension
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/46—Controlling, regulating, or indicating speed
    • G11B15/48—Starting; Accelerating; Decelerating; Arrangements preventing malfunction during drive change
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
    • G11B27/107—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating tapes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/11—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier
    • G11B27/13—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier the information being derived from movement of the record carrier, e.g. using tachometer
    • G11B27/17—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier the information being derived from movement of the record carrier, e.g. using tachometer using electrical sensing means
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/34—Indicating arrangements 
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers

Definitions

  • the present invention relates to a method for controlling the transfer of a flexible web member from a supply reel to a take-up reel, according to which the rotational speeds of the supply reel and the takeup reel are measured and whereby the ratio between these measurements is established independently of the speed and direction of the movement of the web member.
  • the invention also relates to an apparatus for the performance of this method.
  • the invention relates more particularly to a position indicator for a magnetic tape in a recording and playback apparatus, in conjunction with the automatic control of certain operations of the apparatus, such as the control of the winding or rewinding speed in accordance with the extent to which one or other of the reels is filled, programmable friction and braking of the reels, means for automatically stopping the apparatus in a certain preselected position, etc.
  • a position indicator based on the detection of the variable speeds of the two reels would be capable of supplying information independent of the position of the tape, and this would provide an advantage, for example, when use is made of cassettes and one of these latter is introduced into the apparatus after part of the magnetic tape has already been wound onto the take-up reel. Having the ratio between the rotational speeds of the reels furthermore makes it possible to provide an absolute indication, i.e. one which is independent of the speed at which the tape moves.
  • One object of the present invention is to provide a simple, reliable, accurate and inexpensive method for monitoring web movement in a transport apparatus, which will be suitable for use with a plurality of different known types of reel/web assemblies, and enable the operator to be supplied with exact information as to the amount of web still available or already used as to a particular one of the different types which is in the apparatus, information being provided directly in usable units such as minutes and seconds, and also enable a control output to be supplied, in the form of electronic signals, for example, which can be used in a suitable electronic device, for the purpose of controlling certain operations of the apparatus concerned.
  • a further object of the present invention is to provide an apparatus for the performance of the said process.
  • a method for controlling the transfer of a flexible web member from a supply reel to a take-up reel according to which the rotational speeds of the supply reel and the take-up reel are measured and whereby the ratio between these measurements is established independently of the speed and direction of the movement of the web member.
  • the method comprises the steps of storing in memory for each of a plurality of web/reel assemblies of one known type or another known type, electrical signals representing a set of corresponding constants uniquely representing the physical characteristics of one of the different known types of reel/web assemblies, releasing the set of constant corresponding to the ree/web assembly in the apparatus, generating intermediate signals which represent the ratio between the speeds of the reels combining these intermediate signals with the constant recalled from memory and generating output signals representing the momentary position of the web in relation to one or other ends thereof, and using these output signals for the purpose of visually displaying the position of the web and/or of controlling certain operations of the apparatus.
  • the output signals supply indications of the quantity of web wound onto the take-up reel and represent, according to the nature of the constants x and y, either the length of web as an absolute value or as a percentage, or the winding time of the web onto the take-up reel, e.g. in minutes and seconds.
  • the output signals are supplied to a digital or analog counter and converted into a visual display of the position of the web member.
  • This counter is advantageously combined with a presetting button and an automatic stopping system enabling a certain particular position on the web to be rapidly retraced.
  • the output signals are used for the purpose of modifying the voltage of the reel driving motors in accordance with the position of the web member, in such a way as to ensure that the tractive stress exerted on the latter will remain constant.
  • the output signals are used, during the winding or re-winding operation, for the purpose of slowing the driving motion when the end of the web is being approached and possibly at the beginning likewise.
  • this invention provides an apparatus for the performance of this method.
  • the apparatus comprises angular speed detectors for measuring the rotational speed of each of the reels, a micro-processor having two counters totalizing the pulse signals generated by the speed detectors and a divider circuit for generating, on receiving a control signal, intermediate signals representing the ratio between the contents of the counters, a memory storing constants corresponding respectively to different types of reel and web assemblies, and a circuit for combining the intermediate signals with the constants recalled from memory and corresponding to the reel and web assembly used and generating output signals representing the instantaneous position of the web in relation to one or other of its ends.
  • the output signals are applied to a display device serving to indicate the position of the web member.
  • the said control signal is supplied by a third counter which stores the pulse signals of the two speed detectors, the said signal being generated at the moment at which the number of pulses totalized by this counter reaches a certain preselected value.
  • the constants stored in memory of the micro-processor are advantageously released by actuating corresponding keys on a control keyboard in accordance with the particular type of web and reel employed.
  • the system advantageously included the provision of a presetting keyboard or button and a set of comparators connected between the said keyboard and the display device in such a way as to emit a stop signal when the position of the web corresponds to the value selected on the said keyboard.
  • FIG. 1 is a schematic diagram partly in perspective, of a tape transport mechanism with microprocessor control mean
  • FIG. 1a shows a conventional cassette.
  • FIG. 2 is a block diagram illustrating the operation of an apparatus according to the present invention.
  • FIG. 3 is of an equivalent electronic circuit diagram for a position indicator.
  • FIG. 4 is an equivalent electronic circuit diagram for the control of the reel driving motors.
  • FIGS. 5 and 6 show two examples of equivalent electronic circuit diagrams for the control of the reels of the driving motors.
  • FIG. 7 is a voltage diagram of a speed reducing circuit.
  • FIG. 8 is an equivalent block diagram of a search system.
  • FIG. 1 shows a magnetic tape 10 which is transferred in the direction shown by the arrow A from a supply reel 12 to a take-up reel 14.
  • the invention will be described by reference to a transport for magnetic tape recording and play-back apparatus, but it should be noted that the invention can be applied, generally speaking, to apparatus effecting the transfer of any flexible material in the form of a web or tape from a supply reel to a take-up spool.
  • the reels 12 and 14 are contained in a cassette, not shown in the drawings, but it should be noted that the device is likewise applicable to a tape deck with open reels.
  • Each of the two reels 12 and 14 is associated with an electric motor 20 and 22 driving them via shafts 16 and 18 respectively.
  • shafts 16 and 18 With these shafts 16 and 18 are associated angular speed detectors 24 and 26 respectively, already known per se.
  • the said angular speed detectors 24 and 26 comprise perforated discs 28 and 32 and pulse generators 30 and 34 respectively.
  • the component bearing the reference number 36 is a micro-processor well known in the art conventionally including a CPU and program memory.
  • the inputs of the said micro-processor 36 have been shown on the right-hand side of the latter, the outputs for the signals generated by the micro-processor being shown on the left.
  • This micro-processor 36 receives input signals emanating from a control keyboard 37 enabling the operator to actuate the apparatus and to start the various functions, i.e. fast forward, movement at normal speed, stop, fast rewind, recording, pause, these functions being indicated schematically, and in the said order, by the subdivisions of the keyboard 37 in FIG. 1, proceeding from left to right.
  • a second keyboard 38 enables the operator to designate the type of cassette in the apparatus, such as Type C 60, C-90 or C 120, for each of which sets of constants representing characteristics of the respective tone of cassette are stored in the memory of the micro-processor 36 in a cassette constants store.
  • An additional control button can be provided, corresponding to a cassette of a less widely known type, constants representing the characteristics of this cassette likewise being stored in the memory of the micro-processor 36. The latter also receives, on its input side, the pulses from the pulse generators 30 and 34.
  • One of the outputs of the micro-processor 36 is connected to the input of a position indicator or display 40, which is of the digital type. Two other outputs of the micro-processor 36 transmit control signals via control circuit to the motors 20 and 22 in a manner described in greater detail hereinafter.
  • the said tape is caused to run at the speed designated as "normal" by means of a capstan associated with a pinch roller, not shown, a constant speed of rotation being imparted to the capstan by means of a motor, likewise not shown.
  • the reel 14 is driven by its motor 22 in such a way that the magnetic tape is not subjected to any abnormal tractive stress and cannot accumulate between the capstan and the reel 14.
  • the reel becomes a take-up reel, is driven by its motor 20 or 22 at a high speed.
  • the microprocessor is conventional and includes a processor and memory units for storage of constants corresponding to different types of cassettes and programs to operate the processor under program control to monitor the movement of the web in the transport apparatus by determining tape position and displaying the position of the web on a display 40, and by controlling the drive motors 20, 22 in carrying out the various functions of the apparatus.
  • the micro-processor conventionally being based on digital principles.
  • the pulse generators 30 and 34 are devices in which a light ray is chopped by equally spaced apertures provided on the periphery of disc-shaped wheels 28 and 32. In one experimental embodiment of the invention the number of apertures per disc is 20, as shown.
  • These pulse generators 30 and 34 generate, in a manner known per se, pulse trains which represent, either in their frequency or in their amplitude, the angular speeds of each of the reels 12 and 14.
  • Types C 60, C 90 and C 120 are essentially distinguished from one another by the length of the magnetic tape, which at normal delivery speed provides 30, 45 or 60 minutes respectively of play-back or recording time for each direction or movement of the tape, or a total of 60, 90 or 120 minutes, respectively.
  • the apparatus disclosed herein is operable with cassettes of these different types, and provides for each such cassette a determination of absolute values of tape position.
  • position determination algorithms are used including equations employing constants established by physical parameters of the cassettes including tape length and thickness and diameter of the reel hubs, and the ratio of rotational speeds of the reels. The following description explains the derivation of these equations.
  • R 1 external radius of winding on reel 14
  • R 2 external radius of winding on reel 12
  • P 1 number of pulses emanating from detector 34 for a given period
  • P 2 number of pulses emanating from detector 30 for a given period
  • Equations (I) and (I') represent the length of the magnetic tape wound on the take-up reel and on the supply reel respectively i.e. a position determination in terms of linear dimension; Equations (II) and (II') represent the ratios of the length of the magnetic tape wound on the take-up reel 14 and on the supply reel 12 respectively to its total length; i.e. a position determination in non-dimensional terms; while Equations (III) and (III') represent the time taken by the magnetic tape 10 to reach the radius R 1 on the take-up reel 14, and the Radius R 2 on the supply reel 12 respectively i.e. a position indication in terms of time, representing the playback time or recording time which has elapsed since the beginning of the magnetic tape or which remains until the end of the magnetic tape respectively.
  • the sets of constants A,A',A", and B,B',B" for the different types of cassette can be determined statistically, so that account can be taken, with sufficient accuracy, of the very slight variations which may exist between different cassettes of one and the same type and which are caused, for example, by inaccuracies in assembly or manufacture.
  • These same constants can be determined in a similar manner for cassettes which have been recorded in advance and not referenced and of which the lengths vary from one individual cassette to another.
  • Equation (II) the Equation (II) as long as the type of cassette has not been designated by the operator; when it has been designated, on the other hand, Equation (III) will be adopted.
  • the micro-processor 36 after having received the required information from the keyboard 38 designating the type of cassette in the apparatus, transmits to the display 40 a signal representing the position of the tape calculated using Equation (III) as the magnetic tape runs off one reel and transfers to the other.
  • the information supplied by the display 40 is thus, in this case, a time indication.
  • the keys of the keyboard 38 are preferably luminous, enabling the indication of the particular type of cassette loaded in the apparatus to be displayed. These keys, when actuated, automatically cause the reading from memory, in the micro-processor 36, of stored signals corresponding to the sets of constants for the type of cassette in the apparatus, these constants being required for the calculation of tape position utilizing Equation (III) in the manner described above.
  • FIG. 2 illustrates, by means of a block diagram, the various operations performed by the micro-processor 36 under program control, the operations being illustrated by functions performed by analog computer circuits and control circuits.
  • the pulse signals generated by the photo-electric pulse generators 30 and 34 are supplied to counters 42 and 44 of the microprocessor 36 by which these pulses are counted.
  • the two counters 42 and 44 are identical to each other and preferably of the "shift register" type well known in itself. They thus consist of a number of blocks, such as described, for example, in "The TTL Data Book for Design Engineers" (1st edition), Texas instruments, which blocks may contain a given number of pulses or bits, the number in an experimental prototype being 256.
  • the ratio of the number of pulse signals generated by the two pulse generators, 33, 34 i.e. the ratio of the contents of the two shift registers 42 and 44, is determined periodically, these contents being shown hereinafter, for the purposes of the description, by the symbols C 1 and C 2 .
  • the ratio (C 1 /C 2 ) measured at any stage of transfer of the tape from reel to reel is, for purposes of this description, considered equal to the ratio (P 1 /P 2 ) of the pulses generated by the two pulse generators 34 and 30 during a given period.
  • This determination of the reel speed ratio and the consequent determination of tape position using the tape position determination Equation employing the cassette constants and the reel speed ratio as an input variable is preferably periodically repeated, or by means of a counter and control signal generator 46 which receives the pulse trains of the two pulse generators 30 and 34 and which initiates a determination of position by generating a control signal gating the output from the D/A converters 48, 50 to the speed ratio circuit 52 whenever its contents reach a predetermined value which, in one experimental embodiment of the invention, is fixed at 16, representing a predetermined period for position determinations.
  • the signals C 1 and C 2 emanating from the shift registers 42 and 44 are thus applied to the inputs of the two digital-analog converters 48 and 50 respectively.
  • the voltages V 1 and V 2 at the output of each of these converters 48 and 50 thus represent the number of pulses stored in by control signals from the control signal generator, the shift registers 42 and 44, and the ratio between the voltages V 1 and V 2 represents the ratio of speeds of the reels.
  • the two voltages V 1 and V 2 are applied from the D/A converters 48, 50 to the inputs of a speed ratios determination circuit 52 which is implemented with operational amplifiers for purposes of illustration of the operations performed, known per se.
  • This signal V 3 is applied in four data processing circuits 54,56,58 and 60, each consisting of operational amplifiers known per se and therefore not described in detail.
  • the diagrams show, by way of illustration, the types of amplifier suitable for use in the equivalent circuits proposed by the invention. These amplifiers are described in "Semiconductor Data Library,” Vol. 6, Linear Integrated Circuits, Series A, of Motorola Semiconductor Products Inc. For further information on the assembly of these components and on the circuits used, reference may be made to "L'amplificateur Operationnel--Principes et Applications” by R. DAMAYE, 2nd edition, published by the Societe des Editions Radio.
  • the circuit 54 effects the operations to determine tape position using Equations (II) or (III), depending on which set of constants are derived from the constants store and utilized in the algorithmic operations performed by the circuit.
  • the circuit 54 generates a signal proportional to (l 1 /L) or to t 1 , which is applied to the input of the display unit 40 indicating the position of the magnetic tape in relation to its total length as a percentage, or to the end of the tape on one of the reels as a time indication.
  • circuits 56 and 58 are operating control circuits the purpose of which is to determine and apply variable voltages to the driving motors 20 and 22 and thereby vary the output torque in accordance with the position of the tape.
  • the circuit 60 serves to generate a signal the purpose of which is to supply a circuit 62 designed to control the reduction of the reel driving speeds.
  • the operations effected by the microprocessor 36 to determine and supply tape position signals to the display 40, are represented in the determine (l 1 /L) or t 1 circuit 54 which will now be described in greater detail by reference to the equivalent circuit diagram of FIG. 3.
  • the output signal V 4 is applied to one of the input terminals of an adder circuit 54b, another input terminal (labelled "1") of this adder circuit being fed by a voltage signal of unit magnitude.
  • a second input terminal of this divider circuit 54c receives a signal V 5 'representing the constant A' defined above, from the cassette constants store (FIG. 2).
  • This input terminal may be switched automatically into circuit in such a way as to receive a signal representing the constant A", by actuating the appropriate button of the keyboard 38, which releases the stored information from the cassette constants store corresponding to the type of cassette selected.
  • the microprocessor 36 may be controlled to carry out tape position determinations using Equations I', II' or III', in place of Equations I, II and III. It will suffice to permute the terminals of the divider circuit in such way as to operate on a signal proportional to (P 2 /P 1 ) instead of (P 1 /P 2 ). In this case the information supplied will relate, according to the particular algorithm adopted, to the absolute length or length percentage of the tape still available on the delivery reel or the time still required for its transfer to the take-up reel.
  • the output signal of the circuit 54 is converted into a digital value by means of a conventional analog-digital converter and hereafter supplied to the input terminal of a display device 40 of the luminescent diode or liquid crystal type.
  • Equations (I), (II) and (III) are ratios between two magnitudes, in the present embodiment the number of pulse signals representing the angular speeds of the reels, the foregoing calculations and thus the displayed indication will always be valid, regardless of the speed at which the magnetic tape transferred.
  • the driving motor has to be controlled in such a way as to modify the torque in accordance with the diameter of the take-up reel.
  • the ratio of the pulses p 1 and p 2 counted in the counters 42 and 44, represents the variation in the winding diameter of the reels
  • the rotational speed of the motor 22 is controlled by modifying its feed voltage by means of the signal V 3 supplied by the circuit 52 and representing the ratio of these pulse signals.
  • V 3 supplied by the circuit 52
  • FIG. 4 shows the details of the circuit 56.
  • the signal V 3 (see FIG. 2) is applied to one of the input terminals of a multiplier circuit 56a, a second input terminal of this circuit 56a receiving a signal representing the constant F.
  • a second input terminal of this subtraction circuit 56b receives a signal E representing approximately the maximum voltage to be applied to the motor.
  • This voltage increases to the extent to which the ratio (C 1 /C 2 ) decreases, i.e. in the degree in which the take-up reel 14 fills up. This increase caused by the increase in the diameter of the windings on the take-up reel, thereby ensuring a perfectly constant traction on the magnetic tape throughout its movement.
  • the control circuit 58 of the motor 20 is identical to the circuit 56 and will not be described in detail.
  • FIGS. 5 and 6 illustrate two examples of circuits 60a and 60b which can be used for the purpose of generating a control signal to be applied to the circuit 62 in order to reduce the speeds in accordance with the number of pulse signals emitted by the counters 30 and 34.
  • the circuits 60a or 60b thus receive from the circuit 52 (see FIG. 2) the signal V 3 representing the ratio between the rotational speeds of the two reels.
  • These two circuits are connected to two reference voltages selected arbitrarily and representing the rotational speed ratio between the two reels at the beginning and at the end of the tape run-off respectively.
  • These reference voltages may also be associated with the types of cassette and thus selected by means of the keyboard 38 when the type of cassette is being selected.
  • both diodes 50, 51 are conducting and the differential voltage between inputs to the operational amplifier 52 equals zero.
  • the operational amplifier 52 produces an output voltage V s of a predetermined magnitude as indicated in FIG. 7.
  • the diodes of 53, 54 insure anti-latch-up for the operational amplifier 52 and output voltage limitation for increasing switching time.
  • the circuit disclosed in FIG. 6 operates on the same principal, but the window between the voltages V ref1 -V ref2 is insured by two operational amplifiers 60, 61 mounted in parallel.
  • the reference voltage is applied to the inverting terminal of the operational amplifier 61 and to the non-inverting terminal of the operational amplifier 60.
  • the output of both operational amplifiers 60, 61 is low, but shifts high as soon as either operational amplifier is biased to conduct and produce the output voltage V s .
  • the diode 61 is used as the output for limiting the output voltage V s .
  • the output signal V s generated by the operational circuits of the assemblies 60a or 60b remains at level 0 (see FIG. 7).
  • the circuit 62 (see FIG. 2) is not influenced by the operational circuits 60a or 60b and the take-up reel is driven at high speed.
  • the amplitude of the signal V 3 becomes lower than V ref1 or higher than V ref2 the signal Vs will occur at the output of the operational circuits 60a or 60b (see FIG. 7). This signal V s is applied to the circuit 62 and has the effect of braking the supply reel. Circuits of FIGS.
  • FIG. 8 is a schematic block diagram of an equivalent circuit enabling the tape to be rapidly wound or re-wound back to a predetermined position and the drive to be automatically stopped once the tape is in the position corresponding to the passage sought.
  • keyboard 80 consisting of 4 switches with numerical indications it is possible to display that position of the tape to which it is desired to return and by actuating a "search” button 85 the said position is thus traced.
  • This operation is effected by the micro-processor, but for the purpose of the description an equivalent block diagram will likewise be referred to.
  • the start of the search operation will cause the tape to move to a sufficient extent (at normal speed) to enable the counter to "know" the said position.
  • FIG. 8 shows 4 digital display switches 81, 32, 83 and 84, schematically illustrating the presetting keyboard 80. The informations contained therein are directly coded in the switch itself.
  • the outputs of these switches 81,82,83 and 84 are connected to the input terminals of camparators 91, 92,93 and 94 respectively, and these latter may be of the type 7486 (Texas Instruments) which receive in a second input terminal the coded pulse signals from the counter 40 which displays the tape position indication.
  • camparators 91, 92,93 and 94 may be of the type 7486 (Texas Instruments) which receive in a second input terminal the coded pulse signals from the counter 40 which displays the tape position indication.
  • the comparators 91, 92,93 and 94 are set in operation and compare, all at the same time, the information provided by the keybord 80 (subdivided into 4 figures) and that emanating from the numerical display counter 40.
  • a "STOP" circuit 100 When all the comparators obtain zero at their output terminal (i.e. when the figures of the counter 40 are equal to those of the keyboard 80) a "STOP" circuit 100 generates a pulse which serves to stop the apparatus. That part of the tape which corresponds to the preselection is thus in position in front of the magnetic heads.
  • the system has been designed in such a way as to enable the run-off speed of the magnetic tape to be reduced when the difference between the value of the position indication and that of the keyboard 80 is below a certain constant (e.g. 30 sec).
  • a certain constant e.g. 30 sec.
  • the system is also designed in such a way that once the "search” has been carried out the apparatus automatically causes the tape to move at normal speed when the "search" and "normal speed” button have been actuated at the same time.
  • the preselection can also be advantageously effected by means of a keyboard with digital keys numbered from 0 to 9.
  • the value selected by this numerical keyboard is displayed on the counter 40 while the information relating to the position of the tape is stored in the apparatus.
  • the "search" key 85 shown in an isolated position in FIG. 8, can naturally be incorporated in the keyboard 37 shown in FIG. 1.
  • This accuracy is mainly due to the fact that average values are employed in the different operational phases, e.g. in the counters 42, 44, and for the storage of the constants.
  • the invention can be applied to other purposes than that to which the above description relates. Generally speaking, it is applicable to any apparatus or installation involving the motoring and/or control of the transfer of a material in web or thread form from a supply or delivery reel to a take-up reel, particularly in the sphere of information storage or memorization. Within the scope of such applications the invention makes it possible, in particular, for certain types of recording tape, to dispense with a synchronization track on which timing pulses are recorded.

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  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
US05/810,276 1976-07-05 1977-06-27 Transfer of a flexible web member from supply reel to a take-up reel Expired - Lifetime US4172231A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR7620499 1976-07-05
FR7620499A FR2357978A1 (fr) 1976-07-05 1976-07-05 Procede de controle et de commande pour appareils d'enregistrement et de reproduction a bande magnetique
FR7716597 1977-05-31
FR7716597A FR2392914A1 (fr) 1977-05-31 1977-05-31 Controle et asservissement du transfert d'une bande entre deux bobines

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US06/117,371 Reissue USRE30939E (en) 1976-07-05 1980-01-31 Transfer of a flexible web member from supply reel to a take-up reel

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US4172231A true US4172231A (en) 1979-10-23

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US (1) US4172231A (de)
JP (2) JPS536004A (de)
AT (1) AT356917B (de)
AU (1) AU507787B2 (de)
BE (1) BE855968A (de)
CA (1) CA1101100A (de)
CH (1) CH625479A5 (de)
DE (1) DE2730134C2 (de)
ES (1) ES460068A1 (de)
GB (1) GB1555059A (de)
HK (1) HK71480A (de)
IT (1) IT1082780B (de)
NL (1) NL182592C (de)

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US4267564A (en) * 1979-05-09 1981-05-12 Ampex Corporation Apparatus for controlling and stopping a transport mechanism at a predetermined cue point
WO1981001902A1 (en) * 1979-12-31 1981-07-09 R Adams Tape transport system
US4280159A (en) * 1978-05-08 1981-07-21 Sony Corporation Method of and apparatus for indicating length and remaining recording capacity of a recording tape
US4290089A (en) * 1977-12-12 1981-09-15 U.S. Philips Corporation Magnetic-tape cassette with tape counting roller
US4331308A (en) * 1979-05-15 1982-05-25 Olympus Optical Co., Ltd. Back spacing apparatus for a transcribing machine
US4333115A (en) * 1979-12-14 1982-06-01 Honeywell Inc. Tape transport control system
US4338645A (en) * 1978-11-06 1982-07-06 Hitachi, Ltd. Tape running time indication system
US4345287A (en) * 1979-06-26 1982-08-17 Olympus Optical Co., Ltd. Word line number count/display device for tape recorder
US4347538A (en) * 1977-12-07 1982-08-31 Licentia Patent-Verwaltungs-Gmbh Method and apparatus for the measurement and indication of the position of a coiled material in tape form
US4352173A (en) * 1979-04-09 1982-09-28 Lanier Business Products, Inc. Dictation display device
US4352472A (en) * 1979-01-11 1982-10-05 Bang And Olufsen A/S System for detection of tape thickness in tape recorders or players
US4357643A (en) * 1978-12-27 1982-11-02 Staar S.A. Method and apparatus for correcting automatically the designation of type of tape carrier
US4366371A (en) * 1977-12-09 1982-12-28 Alayer De Costemore D Arc Step Method and apparatus for controlling tape transport apparatus for cassettes
US4370684A (en) * 1979-05-15 1983-01-25 Olympus Optical Co., Ltd. Tape recorder with automatic tape end stopping and alarm generation
US4370682A (en) * 1979-01-12 1983-01-25 Victor Company Of Japan, Ltd. Tape loading apparatus in a recording and/or reproducing apparatus
US4373150A (en) * 1979-12-17 1983-02-08 General Electric Company Motor control system
US4378517A (en) * 1979-07-05 1983-03-29 Cableform Limited Method and apparatus for controlling the energization of an electric motor
US4385329A (en) * 1980-12-02 1983-05-24 Pioneer Electronic Corporation Tape drive control system for pinch roller-less type tape recorder
DE3151956A1 (de) * 1981-12-30 1983-07-07 Agfa-Gevaert Ag, 5090 Leverkusen Einrichtung zum transportieren eines bandfoermigen kopiermaterials
US4399355A (en) * 1977-09-30 1983-08-16 Olympus Optical Co., Ltd. Display apparatus for tape running positions
US4399527A (en) * 1979-04-09 1983-08-16 Lanier Business Products, Inc. Dictation display device
US4407462A (en) * 1980-08-15 1983-10-04 Hitachi, Ltd. Web drive apparatus
US4408335A (en) * 1977-12-09 1983-10-04 Staar S. A. Method and apparatus for controlling tape transport apparatus for cassettes
US4411008A (en) * 1977-12-09 1983-10-18 Staar S. A. Method and apparatus for controlling tape transport apparatus in search sequence
US4442985A (en) * 1981-04-06 1984-04-17 Sony Corporation Apparatus for controlling a web transport system
DE3329428A1 (de) * 1982-09-02 1984-05-10 Mitsubishi Denki K.K., Tokio/Tokyo Bandmengenanzeigevorrichtung
US4448368A (en) * 1982-03-23 1984-05-15 Raymond Engineering Inc. Control for tape drive system
US4479159A (en) * 1981-02-25 1984-10-23 Pioneer Electronic Corporation Process for detecting transported and residual tape amounts
US4485416A (en) * 1981-07-24 1984-11-27 U.S. Philips Corporation Automatic reversing mechanism for a magnetic-tape apparatus
US4496117A (en) * 1982-11-01 1985-01-29 Canon Kabushiki Kaisha Web transport device
US4523133A (en) * 1982-01-13 1985-06-11 Computer Peripherals Inc. Tape transport system with tension sensing bearings
US4525654A (en) * 1981-12-09 1985-06-25 Hitachi, Ltd. Tape transport control unit
US4546399A (en) * 1977-12-13 1985-10-08 Olympus Optical Company Limited Tape recorder
EP0164256A1 (de) * 1984-05-31 1985-12-11 Fujitsu Limited Motorsteuergerät für Bandantriebssystem mit Spulen
US4736900A (en) * 1984-12-21 1988-04-12 Fujitsu Ltd Motor control apparatus for reel-to-reel tape drive system
US4739950A (en) * 1986-08-28 1988-04-26 Teac Corporation Of America Constant velocity tape drive system
DE3843085A1 (de) * 1987-12-21 1989-06-29 Toshiba Kawasaki Kk Bandkassettentyp-unterscheidungsvorrichtung
US4858213A (en) * 1986-08-08 1989-08-15 Dictaphone Corporation Display for modular dictation/transcription system
US4866547A (en) * 1988-04-01 1989-09-12 Rodal David R Circuit for detecting the end of a tape by counting reel revolutions
US4963999A (en) * 1987-02-23 1990-10-16 Kabushiki Kaisha Toshiba Tape position detection apparatus having start control and initial tape position recovery
US4996611A (en) * 1987-08-31 1991-02-26 Kabushiki Kaisha Toshiba Tape position data indicating apparatus for cassette tape player
US5018040A (en) * 1987-03-20 1991-05-21 Mitsubishi Denki Kabushiki Kaisha Tape time display device for displaying a tape remainder time
US5063470A (en) * 1988-07-18 1991-11-05 Canon Kabushiki Kaisha Information signal reproducing apparatus capable of grasping reproducing position on a tape-shaped recording medium
US5125588A (en) * 1990-08-06 1992-06-30 Tapematic U.S.A., Inc. Method and apparatus for locating a predetermined point on a cassette tape
US5157562A (en) * 1987-10-20 1992-10-20 Kabushiki Kaisha Toshiba High-speed magnetic tape transfer apparatus allowing use of a smaller capacity reel motor by assisting the high-speed transfer with a capston motor
US5172444A (en) * 1987-05-15 1992-12-22 Penet Charles M A Jig
US5282098A (en) * 1990-05-11 1994-01-25 Matsushita Electric Industrial Co., Ltd. Capstan controlling apparatus including capstan, supply side reel and winding side reel rotation detectors
WO1995016991A1 (en) * 1993-12-15 1995-06-22 Kwoh Daniel S Method and apparatus for determining addresses in time along a recording tape
US5659833A (en) * 1995-10-30 1997-08-19 Anacomp, Inc. Reloadable film canister system
US5724203A (en) * 1991-08-19 1998-03-03 Index Systems, Inc. Method and apparatus for determining addresses in time along a recording tape
US5809358A (en) * 1990-03-29 1998-09-15 Anacomp, Inc. Reloadable canister with replaceable film spool
US5850316A (en) * 1994-07-29 1998-12-15 Sony Corporation Tape cartridge and driving system having rotation detection unit for drive roll to maintain constant contact pressure with the capstan roll
US6134067A (en) * 1993-07-30 2000-10-17 Canon Kabushiki Kaisha Cassette device for using cassettes with and without a second recording medium in the cassette
US20040195424A1 (en) * 2003-02-21 2004-10-07 Igal Roytblat Methods and systems for control of film transport
US20160167913A1 (en) * 2012-11-15 2016-06-16 Grg Banking Equipment Co., Ltd. Banknote temporary storage module and reel rotating speed control method thereof
US11833814B2 (en) 2017-11-27 2023-12-05 Landa Corporation Ltd. Calibration of runout error in a digital printing system
US11912022B2 (en) 2019-08-20 2024-02-27 Landa Corporation Ltd. Apparatus for controlling tension applied to a flexible member
US12001902B2 (en) 2018-08-13 2024-06-04 Landa Corporation Ltd. Correcting distortions in digital printing by implanting dummy pixels in a digital image

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JPS6028060B2 (ja) * 1979-04-14 1985-07-02 オリンパス光学工業株式会社 テ−プ終端予告装置
JPS55156438U (de) * 1979-04-24 1980-11-11
JPS5629220U (de) * 1979-08-14 1981-03-19
JPS5637852A (en) * 1979-09-04 1981-04-11 Sony Corp Tape run driver of vtr
JPS5687255A (en) * 1979-12-15 1981-07-15 Sanyo Electric Co Ltd Tape travel control unit
JPS5740777A (en) * 1980-08-22 1982-03-06 Victor Co Of Japan Ltd High-speed tape feed system of recordng and reproducing device
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JPS58158068A (ja) * 1982-03-15 1983-09-20 Matsushita Electric Ind Co Ltd テ−プ巻取り装置
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JPS5958644A (ja) * 1982-09-28 1984-04-04 Fujitsu Ltd 磁気テ−プ装置
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JPS60157890A (ja) * 1984-01-27 1985-08-19 Toshiba Corp 画像形成装置
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JPS62236192A (ja) * 1986-04-07 1987-10-16 Sony Corp テ−プ位置検出装置
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JPH0614307Y2 (ja) * 1988-11-04 1994-04-13 ナカミチ株式会社 リール駆動装置
JPH02308462A (ja) * 1989-05-23 1990-12-21 Victor Co Of Japan Ltd カセット判別装置
KR920004249B1 (ko) * 1989-06-10 1992-05-30 삼성전자 주식회사 디지탈 오디오 테이프 레코더의 고속 서치방법
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Cited By (63)

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US4399355A (en) * 1977-09-30 1983-08-16 Olympus Optical Co., Ltd. Display apparatus for tape running positions
US4347538A (en) * 1977-12-07 1982-08-31 Licentia Patent-Verwaltungs-Gmbh Method and apparatus for the measurement and indication of the position of a coiled material in tape form
US4366371A (en) * 1977-12-09 1982-12-28 Alayer De Costemore D Arc Step Method and apparatus for controlling tape transport apparatus for cassettes
US4408335A (en) * 1977-12-09 1983-10-04 Staar S. A. Method and apparatus for controlling tape transport apparatus for cassettes
US4411008A (en) * 1977-12-09 1983-10-18 Staar S. A. Method and apparatus for controlling tape transport apparatus in search sequence
US4290089A (en) * 1977-12-12 1981-09-15 U.S. Philips Corporation Magnetic-tape cassette with tape counting roller
US4546399A (en) * 1977-12-13 1985-10-08 Olympus Optical Company Limited Tape recorder
US4280159A (en) * 1978-05-08 1981-07-21 Sony Corporation Method of and apparatus for indicating length and remaining recording capacity of a recording tape
US4338645A (en) * 1978-11-06 1982-07-06 Hitachi, Ltd. Tape running time indication system
US4357643A (en) * 1978-12-27 1982-11-02 Staar S.A. Method and apparatus for correcting automatically the designation of type of tape carrier
US4352472A (en) * 1979-01-11 1982-10-05 Bang And Olufsen A/S System for detection of tape thickness in tape recorders or players
US4370682A (en) * 1979-01-12 1983-01-25 Victor Company Of Japan, Ltd. Tape loading apparatus in a recording and/or reproducing apparatus
US4352173A (en) * 1979-04-09 1982-09-28 Lanier Business Products, Inc. Dictation display device
US4399527A (en) * 1979-04-09 1983-08-16 Lanier Business Products, Inc. Dictation display device
US4267564A (en) * 1979-05-09 1981-05-12 Ampex Corporation Apparatus for controlling and stopping a transport mechanism at a predetermined cue point
US4370684A (en) * 1979-05-15 1983-01-25 Olympus Optical Co., Ltd. Tape recorder with automatic tape end stopping and alarm generation
US4331308A (en) * 1979-05-15 1982-05-25 Olympus Optical Co., Ltd. Back spacing apparatus for a transcribing machine
US4345287A (en) * 1979-06-26 1982-08-17 Olympus Optical Co., Ltd. Word line number count/display device for tape recorder
US4577252A (en) * 1979-06-26 1986-03-18 Olympus Optical Co., Ltd. Word line number count/display device for tape recorder
US4378517A (en) * 1979-07-05 1983-03-29 Cableform Limited Method and apparatus for controlling the energization of an electric motor
US4333115A (en) * 1979-12-14 1982-06-01 Honeywell Inc. Tape transport control system
US4373150A (en) * 1979-12-17 1983-02-08 General Electric Company Motor control system
WO1981001902A1 (en) * 1979-12-31 1981-07-09 R Adams Tape transport system
US4407462A (en) * 1980-08-15 1983-10-04 Hitachi, Ltd. Web drive apparatus
US4385329A (en) * 1980-12-02 1983-05-24 Pioneer Electronic Corporation Tape drive control system for pinch roller-less type tape recorder
US4479159A (en) * 1981-02-25 1984-10-23 Pioneer Electronic Corporation Process for detecting transported and residual tape amounts
US4442985A (en) * 1981-04-06 1984-04-17 Sony Corporation Apparatus for controlling a web transport system
US4485416A (en) * 1981-07-24 1984-11-27 U.S. Philips Corporation Automatic reversing mechanism for a magnetic-tape apparatus
US4525654A (en) * 1981-12-09 1985-06-25 Hitachi, Ltd. Tape transport control unit
DE3151956A1 (de) * 1981-12-30 1983-07-07 Agfa-Gevaert Ag, 5090 Leverkusen Einrichtung zum transportieren eines bandfoermigen kopiermaterials
US4544110A (en) * 1981-12-30 1985-10-01 Agfa-Gevaert Aktiengesellschaft Apparatus for introducing strip-shaped material into cassettes or the like
US4523133A (en) * 1982-01-13 1985-06-11 Computer Peripherals Inc. Tape transport system with tension sensing bearings
US4448368A (en) * 1982-03-23 1984-05-15 Raymond Engineering Inc. Control for tape drive system
DE3329428A1 (de) * 1982-09-02 1984-05-10 Mitsubishi Denki K.K., Tokio/Tokyo Bandmengenanzeigevorrichtung
US4496117A (en) * 1982-11-01 1985-01-29 Canon Kabushiki Kaisha Web transport device
EP0164256A1 (de) * 1984-05-31 1985-12-11 Fujitsu Limited Motorsteuergerät für Bandantriebssystem mit Spulen
US4664336A (en) * 1984-05-31 1987-05-12 Fujitsu Limited Motor control apparatus for reel-to-reel tape drive system
US4736900A (en) * 1984-12-21 1988-04-12 Fujitsu Ltd Motor control apparatus for reel-to-reel tape drive system
US4858213A (en) * 1986-08-08 1989-08-15 Dictaphone Corporation Display for modular dictation/transcription system
US4739950A (en) * 1986-08-28 1988-04-26 Teac Corporation Of America Constant velocity tape drive system
US4963999A (en) * 1987-02-23 1990-10-16 Kabushiki Kaisha Toshiba Tape position detection apparatus having start control and initial tape position recovery
US5018040A (en) * 1987-03-20 1991-05-21 Mitsubishi Denki Kabushiki Kaisha Tape time display device for displaying a tape remainder time
US5172444A (en) * 1987-05-15 1992-12-22 Penet Charles M A Jig
US4996611A (en) * 1987-08-31 1991-02-26 Kabushiki Kaisha Toshiba Tape position data indicating apparatus for cassette tape player
US5157562A (en) * 1987-10-20 1992-10-20 Kabushiki Kaisha Toshiba High-speed magnetic tape transfer apparatus allowing use of a smaller capacity reel motor by assisting the high-speed transfer with a capston motor
DE3843085A1 (de) * 1987-12-21 1989-06-29 Toshiba Kawasaki Kk Bandkassettentyp-unterscheidungsvorrichtung
US4989112A (en) * 1987-12-21 1991-01-29 Kabushiki Kaisha Toshiba Apparatus for discriminating types of tape cassettes
US4866547A (en) * 1988-04-01 1989-09-12 Rodal David R Circuit for detecting the end of a tape by counting reel revolutions
US5063470A (en) * 1988-07-18 1991-11-05 Canon Kabushiki Kaisha Information signal reproducing apparatus capable of grasping reproducing position on a tape-shaped recording medium
US5809358A (en) * 1990-03-29 1998-09-15 Anacomp, Inc. Reloadable canister with replaceable film spool
US5282098A (en) * 1990-05-11 1994-01-25 Matsushita Electric Industrial Co., Ltd. Capstan controlling apparatus including capstan, supply side reel and winding side reel rotation detectors
US5125588A (en) * 1990-08-06 1992-06-30 Tapematic U.S.A., Inc. Method and apparatus for locating a predetermined point on a cassette tape
US5724203A (en) * 1991-08-19 1998-03-03 Index Systems, Inc. Method and apparatus for determining addresses in time along a recording tape
US6134067A (en) * 1993-07-30 2000-10-17 Canon Kabushiki Kaisha Cassette device for using cassettes with and without a second recording medium in the cassette
WO1995016991A1 (en) * 1993-12-15 1995-06-22 Kwoh Daniel S Method and apparatus for determining addresses in time along a recording tape
US5850316A (en) * 1994-07-29 1998-12-15 Sony Corporation Tape cartridge and driving system having rotation detection unit for drive roll to maintain constant contact pressure with the capstan roll
US5659833A (en) * 1995-10-30 1997-08-19 Anacomp, Inc. Reloadable film canister system
US20040195424A1 (en) * 2003-02-21 2004-10-07 Igal Roytblat Methods and systems for control of film transport
US7207514B2 (en) * 2003-02-21 2007-04-24 Imax Corporation Methods and systems for control of film transport
US20160167913A1 (en) * 2012-11-15 2016-06-16 Grg Banking Equipment Co., Ltd. Banknote temporary storage module and reel rotating speed control method thereof
US11833814B2 (en) 2017-11-27 2023-12-05 Landa Corporation Ltd. Calibration of runout error in a digital printing system
US12001902B2 (en) 2018-08-13 2024-06-04 Landa Corporation Ltd. Correcting distortions in digital printing by implanting dummy pixels in a digital image
US11912022B2 (en) 2019-08-20 2024-02-27 Landa Corporation Ltd. Apparatus for controlling tension applied to a flexible member

Also Published As

Publication number Publication date
AT356917B (de) 1980-06-10
GB1555059A (en) 1979-11-07
JPS6026653U (ja) 1985-02-22
AU507787B2 (en) 1980-02-28
NL7707381A (nl) 1978-01-09
AU2661877A (en) 1979-01-04
DE2730134C2 (de) 1983-03-03
IT1082780B (it) 1985-05-21
NL182592C (nl) 1988-04-05
DE2730134A1 (de) 1978-02-16
ATA473977A (de) 1979-10-15
HK71480A (en) 1981-01-02
BE855968A (fr) 1977-10-17
CH625479A5 (de) 1981-09-30
NL182592B (nl) 1987-11-02
JPS536004A (en) 1978-01-20
CA1101100A (en) 1981-05-12
ES460068A1 (es) 1978-08-16

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